Distal BMC (dBMC), distal BMD (dBMD) and ultradistal BMD (udBMD) at the radius were measured by single X-ray absorptiometry (Osteometer DTX-100, Denmark). Additionally, there were assessments of the corresponding geometrical areas, such as radial area (RadAr), ulnar area (UlnAr) and ultradistal area (udAr). BMD is expressed as grams/cm2; BMC is expressed in grams and Area as cm2 The in vivo precision for the BMD and BMC measurements in our laboratory was 1-5%.